Throughout videos she says Chinese for Mandarin. There are many people who do not speak Mandarin in Chinatown NY ( and Flushing also ). Most of these people speak Cantonese or Hokkien. In part 2 of the video she defines eating breakfast pastries 点心 as dimsum, a Cantonese word. Many Cantonese and Hokkien speakers can speak Mandarin but most Mandarin speakers can not speak Cantonese or Hokkien.